Silver hake
Abigail Tyrell
30 Dec 2020
This is a preliminary report of previously collected data. This report is pulling information on all Northeast Silver hake stocks.
Methods
General methods
Northeast stocks were identified from NOAA/EDAB ECSA seasonal species strata.
Data sources for each analysis are identified in the Results.
All continuous temporal data were plotted against time. If there were 30 or more years of data, a geom_gls regression line was fit (yellow = significant increase; purple = significant decrease; no line = no significant trend). If there were fewer than 30 years of data, no regression was fit.
assessmentdata methods
Stock assessment and data quality information were compiled into a summary table.
B/Bmsy was classified as “DANGER” if it was below 1 and “GOOD” if it was above 1.
F/Fmsy was classified as “DANGER” if it was above 1 and “GOOD” if it was below 1.
survdat methods
survdat data with zero abundance were not included in this analysis. Abundance and biomass were summed for each year and season. All other metrics were averaged for each year and season. The tables show summary statistics for the entire time series and for the most recent 5 years in the time series.
Results
Indicator time series
Latitude and longitude
Latitude and longitude ranges were compiled from NOAA/EDAB ECSA seasonal species strata and Bottom Trawl Survey (BTS) shapefiles. The coordinate system is WGS84.
| Region | Season | Lat_min | Long_min | Lat_max | Long_max | Warning |
|---|---|---|---|---|---|---|
| Southern Georges Bank / Mid | fall | -75.66 | 35.5 | -65.68 | 42.08 | none |
| Southern Georges Bank / Mid | spring | -75.66 | 35.5 | -65.68 | 42.08 | none |
| Gulf of Maine / Northern Georges Bank | fall | -70.67 | 41 | -65.57 | 44.49 | none |
| Gulf of Maine / Northern Georges Bank | spring | -70.67 | 41 | -65.57 | 44.49 | none |
Stock assessment and data quality information
Stock assessment and data quality information were pulled from assessmentdata::stockAssessmentSummary.
| Species | Region | Assessment Year | Last Data Year | Biological Data Rating (2019) | Biological Data Rating (before 2019) | Size Data Rating | Ecosystem Linkage Data Rating | FSSI status | Review Result | |
|---|---|---|---|---|---|---|---|---|---|---|
| 146 | Silver hake | Gulf of Maine / Northern Georges Bank | 2005 | 2004 | NA | 2 | NA | NA | Y | Full acceptance |
| 147 | Silver hake | Gulf of Maine / Northern Georges Bank | 2011 | 2009 | NA | 2 | NA | NA | Y | Accept previous approach, remand new attempt |
| 148 | Silver hake | Gulf of Maine / Northern Georges Bank | 2014 | 2013 | NA | 2 | NA | NA | Y | Full acceptance |
| 149 | Silver hake | Gulf of Maine / Northern Georges Bank | 2017 | 2017 | NA | 2 | NA | NA | Y | Full acceptance |
| 150 | Silver hake | Southern Georges Bank / Mid-Atlantic | 2005 | 2004 | NA | 2 | NA | NA | Y | Full acceptance |
| 151 | Silver hake | Southern Georges Bank / Mid-Atlantic | 2011 | 2009 | NA | 2 | NA | NA | Y | Accept previous approach, remand new attempt |
| 152 | Silver hake | Southern Georges Bank / Mid-Atlantic | 2014 | 2013 | NA | 2 | NA | NA | Y | Full acceptance |
| 153 | Silver hake | Southern Georges Bank / Mid-Atlantic | 2017 | 2017 | NA | 2 | NA | NA | Y | Full acceptance |
B/Bmsy
B/Bmsy data were pulled from assessmentdata::stockAssessmentSummary.
The most recent status of B/Bmsy is: GOOD, DANGER
Figure
Data
F/Fmsy
F/Fmsy data were pulled from assessmentdata::stockAssessmentSummary.
The most recent status of F/Fmsy is: GOOD, GOOD
Figure
Data
Recruitment
Recruitment data were pulled from assessmentdata::stockAssessmentData. Separate geom_gls() functions were fit for each region; trend lines are only shown when the trend was statistically significant, so some plots may have fewer trend lines than regions.
Figure
## [1] "NO DATA"Data
Diet
Diet data were compiled from existing data. For analysis, all geographic samples were grouped by season, year, and region, and only year-season-region combinations with more than 20 predators sampled were considered. Prey items that made up more than 5% of the predator’s diet in at least one year-season-region were identified to the broad category level; all other prey are grouped into the “other” category.
Figure
Summary
| Prey category | Season | Region | Mean proportion +- SD (n years) | Range |
|---|---|---|---|---|
| ANIMAL_REMAINS | FALL | Gulf of Maine / Northern Georges Bank | 0.018 +- 0.04 (39) | 0 - 0.256 |
| ANIMAL_REMAINS | FALL | Outside stock area | 0.02 +- 0.036 (31) | 0 - 0.19 |
| ANIMAL_REMAINS | FALL | Southern Georges Bank / Mid | 0.023 +- 0.018 (41) | 0 - 0.087 |
| ANIMAL_REMAINS | SPRING | Gulf of Maine / Northern Georges Bank | 0.02 +- 0.027 (39) | 0 - 0.154 |
| ANIMAL_REMAINS | SPRING | Outside stock area | 0.033 +- 0.046 (30) | 0.001 - 0.188 |
| ANIMAL_REMAINS | SPRING | Southern Georges Bank / Mid | 0.024 +- 0.027 (41) | 0 - 0.12 |
| ANIMAL_REMAINS | SUMMER | Gulf of Maine / Northern Georges Bank | 0.004 +- 0.004 (8) | 0 - 0.011 |
| ANIMAL_REMAINS | SUMMER | Outside stock area | 0.012 +- 0.016 (7) | 0 - 0.046 |
| ANIMAL_REMAINS | SUMMER | Southern Georges Bank / Mid | 0.008 +- 0.011 (2) | 0 - 0.016 |
| ANIMAL_REMAINS | WINTER | Outside stock area | 0.004 +- 0.002 (2) | 0.002 - 0.005 |
| ANIMAL_REMAINS | WINTER | Southern Georges Bank / Mid | 0.024 +- 0.024 (16) | 0.002 - 0.082 |
| ANNELIDA | FALL | Gulf of Maine / Northern Georges Bank | 0 +- 0 (12) | 0 - 0.001 |
| ANNELIDA | FALL | Outside stock area | 0.012 +- 0.031 (10) | 0 - 0.1 |
| ANNELIDA | FALL | Southern Georges Bank / Mid | 0.009 +- 0.029 (16) | 0 - 0.117 |
| ANNELIDA | SPRING | Gulf of Maine / Northern Georges Bank | 0.001 +- 0.002 (11) | 0 - 0.005 |
| ANNELIDA | SPRING | Outside stock area | 0.003 +- 0.004 (9) | 0 - 0.014 |
| ANNELIDA | SPRING | Southern Georges Bank / Mid | 0.001 +- 0.001 (19) | 0 - 0.004 |
| ANNELIDA | SUMMER | Gulf of Maine / Northern Georges Bank | 0 +- 0 (2) | 0 - 0 |
| ANNELIDA | SUMMER | Outside stock area | 0.008 +- 0.005 (3) | 0.002 - 0.012 |
| ANNELIDA | WINTER | Southern Georges Bank / Mid | 0.002 +- 0.003 (5) | 0 - 0.006 |
| ARTHROPODA | FALL | Gulf of Maine / Northern Georges Bank | 0.343 +- 0.29 (42) | 0.017 - 1 |
| ARTHROPODA | FALL | Outside stock area | 0.199 +- 0.173 (37) | 0.011 - 0.786 |
| ARTHROPODA | FALL | Southern Georges Bank / Mid | 0.2 +- 0.124 (41) | 0.031 - 0.591 |
| ARTHROPODA | SPRING | Gulf of Maine / Northern Georges Bank | 0.378 +- 0.26 (40) | 0.048 - 0.931 |
| ARTHROPODA | SPRING | Outside stock area | 0.333 +- 0.26 (36) | 0.03 - 0.913 |
| ARTHROPODA | SPRING | Southern Georges Bank / Mid | 0.187 +- 0.132 (41) | 0.025 - 0.709 |
| ARTHROPODA | SUMMER | Gulf of Maine / Northern Georges Bank | 0.351 +- 0.29 (8) | 0.118 - 0.999 |
| ARTHROPODA | SUMMER | Outside stock area | 0.275 +- 0.225 (7) | 0.063 - 0.738 |
| ARTHROPODA | SUMMER | Southern Georges Bank / Mid | 0.033 +- 0.014 (2) | 0.024 - 0.043 |
| ARTHROPODA | WINTER | Outside stock area | 0.466 +- 0.095 (2) | 0.399 - 0.533 |
| ARTHROPODA | WINTER | Southern Georges Bank / Mid | 0.146 +- 0.102 (16) | 0.015 - 0.356 |
| FISH | FALL | Gulf of Maine / Northern Georges Bank | 0.649 +- 0.283 (41) | 0 - 0.982 |
| FISH | FALL | Outside stock area | 0.76 +- 0.192 (37) | 0.094 - 0.985 |
| FISH | FALL | Southern Georges Bank / Mid | 0.688 +- 0.155 (41) | 0.241 - 0.884 |
| FISH | SPRING | Gulf of Maine / Northern Georges Bank | 0.601 +- 0.263 (40) | 0.062 - 0.951 |
| FISH | SPRING | Outside stock area | 0.636 +- 0.267 (36) | 0.071 - 0.94 |
| FISH | SPRING | Southern Georges Bank / Mid | 0.637 +- 0.187 (41) | 0.059 - 0.97 |
| FISH | SUMMER | Gulf of Maine / Northern Georges Bank | 0.721 +- 0.158 (7) | 0.481 - 0.882 |
| FISH | SUMMER | Outside stock area | 0.59 +- 0.333 (7) | 0.018 - 0.932 |
| FISH | SUMMER | Southern Georges Bank / Mid | 0.957 +- 0.027 (2) | 0.937 - 0.976 |
| FISH | WINTER | Outside stock area | 0.531 +- 0.097 (2) | 0.462 - 0.599 |
| FISH | WINTER | Southern Georges Bank / Mid | 0.544 +- 0.25 (16) | 0.171 - 0.885 |
| MOLLUSCA | FALL | Gulf of Maine / Northern Georges Bank | 0.013 +- 0.017 (19) | 0 - 0.067 |
| MOLLUSCA | FALL | Outside stock area | 0.037 +- 0.049 (20) | 0.001 - 0.161 |
| MOLLUSCA | FALL | Southern Georges Bank / Mid | 0.097 +- 0.084 (36) | 0.003 - 0.312 |
| MOLLUSCA | SPRING | Gulf of Maine / Northern Georges Bank | 0.002 +- 0.002 (3) | 0 - 0.004 |
| MOLLUSCA | SPRING | Outside stock area | 0.009 +- 0.01 (6) | 0 - 0.022 |
| MOLLUSCA | SPRING | Southern Georges Bank / Mid | 0.163 +- 0.132 (38) | 0.005 - 0.653 |
| MOLLUSCA | SUMMER | Gulf of Maine / Northern Georges Bank | 0.027 +- 0.043 (4) | 0.002 - 0.092 |
| MOLLUSCA | SUMMER | Outside stock area | 0.838 +- NA (1) | 0.838 - 0.838 |
| MOLLUSCA | SUMMER | Southern Georges Bank / Mid | 0.003 +- NA (1) | 0.003 - 0.003 |
| MOLLUSCA | WINTER | Southern Georges Bank / Mid | 0.285 +- 0.205 (16) | 0.036 - 0.641 |
| OTHER | FALL | Gulf of Maine / Northern Georges Bank | 0.002 +- 0.005 (19) | 0 - 0.023 |
| OTHER | FALL | Outside stock area | 0.001 +- 0.001 (4) | 0 - 0.002 |
| OTHER | FALL | Southern Georges Bank / Mid | 0.001 +- 0.002 (23) | 0 - 0.008 |
| OTHER | SPRING | Gulf of Maine / Northern Georges Bank | 0.001 +- 0.001 (16) | 0 - 0.003 |
| OTHER | SPRING | Outside stock area | 0.002 +- 0.004 (10) | 0 - 0.012 |
| OTHER | SPRING | Southern Georges Bank / Mid | 0.002 +- 0.003 (24) | 0 - 0.01 |
| OTHER | SUMMER | Gulf of Maine / Northern Georges Bank | 0 +- 0 (3) | 0 - 0 |
| OTHER | SUMMER | Outside stock area | 0 +- 0 (2) | 0 - 0 |
| OTHER | SUMMER | Southern Georges Bank / Mid | 0 +- NA (1) | 0 - 0 |
| OTHER | WINTER | Southern Georges Bank / Mid | 0.003 +- 0.003 (5) | 0 - 0.008 |
Data
Temperature
Surface and bottom temperature data were pulled from survdat.
Figures
Separate geom_gls() functions were fit for fall and spring measurements; trend lines are only shown when the trend was statistically significant, so some plots may have fewer than two trend lines. Fall has solid trend lines, and spring has dashed trend lines. Please note, sometimes the survey observed a small number of fish outside of the defined stock area. 
Summary
| Season | Region | Mean value +- SD (n years) | Mean value +- SD (past 5 years) | Range (total) | Range (past 5 years) |
|---|---|---|---|---|---|
| FALL | Gulf of Maine / Northern Georges Bank | 11.93 +- 1.3 (57) | 13.27 +- 0.51 (5) | 8.62 - 14.36 | 12.47 - 13.75 |
| FALL | Outside stock area | 13.7 +- 2.3 (57) | 14.91 +- 1.31 (5) | 7.66 - 17.24 | 12.98 - 16.66 |
| FALL | Southern Georges Bank / Mid | 17.59 +- 2.25 (57) | 18.84 +- 2.33 (5) | 9.41 - 20.7 | 14.78 - 20.36 |
| SPRING | Gulf of Maine / Northern Georges Bank | 5.64 +- 1.25 (52) | 7.44 +- 1.7 (5) | 3.61 - 10.1 | 5.58 - 10.1 |
| SPRING | Outside stock area | 5.9 +- 1.77 (52) | 7.55 +- 1.79 (5) | 2.69 - 11.69 | 6.41 - 10.73 |
| SPRING | Southern Georges Bank / Mid | 6.64 +- 0.96 (52) | 7.67 +- 1.16 (5) | 4.97 - 9.57 | 6.46 - 9.57 |
| SUMMER | Gulf of Maine / Northern Georges Bank | 16.41 +- 0.75 (6) | 16.81 +- 0.95 (3) | 15.71 - 17.44 | 15.71 - 17.44 |
| SUMMER | Outside stock area | 18.29 +- 1.54 (6) | 17.72 +- 1.8 (3) | 16.55 - 20.06 | 16.55 - 19.79 |
| SUMMER | Southern Georges Bank / Mid | 20.62 +- 1.7 (3) | 20.62 +- 1.7 (3) | 18.65 - 21.63 | 18.65 - 21.63 |
| WINTER | Gulf of Maine / Northern Georges Bank | 4.24 +- NA (1) | 4.24 +- NA (1) | 4.24 - 4.24 | 4.24 - 4.24 |
| WINTER | Outside stock area | 3.76 +- 1.23 (3) | 3.76 +- 1.23 (3) | 2.5 - 4.95 | 2.5 - 4.95 |
| WINTER | Southern Georges Bank / Mid | 6.78 +- 0.88 (15) | 6.87 +- 0.92 (5) | 5.53 - 7.97 | 5.7 - 7.96 |
| Season | Region | Mean value +- SD (n years) | Mean value +- SD (past 5 years) | Range (total) | Range (past 5 years) |
|---|---|---|---|---|---|
| FALL | Gulf of Maine / Northern Georges Bank | 8.33 +- 0.85 (57) | 9.36 +- 0.37 (5) | 6.09 - 9.69 | 8.75 - 9.69 |
| FALL | Outside stock area | 11.94 +- 2.62 (57) | 13.05 +- 1.88 (5) | 5.5 - 15.98 | 10.22 - 15.52 |
| FALL | Southern Georges Bank / Mid | 11.7 +- 1.02 (57) | 12.65 +- 0.44 (5) | 9.52 - 13.71 | 12.14 - 13.21 |
| SPRING | Gulf of Maine / Northern Georges Bank | 6.18 +- 0.62 (52) | 6.89 +- 0.69 (5) | 4.9 - 7.52 | 5.78 - 7.52 |
| SPRING | Outside stock area | 6 +- 1.07 (52) | 6.25 +- 1.16 (5) | 4.54 - 9.69 | 5.53 - 8.29 |
| SPRING | Southern Georges Bank / Mid | 7.88 +- 0.81 (52) | 8.66 +- 0.69 (5) | 5.82 - 9.73 | 8.06 - 9.73 |
| SUMMER | Gulf of Maine / Northern Georges Bank | 7 +- 0.57 (6) | 7.22 +- 0.63 (3) | 6.47 - 7.8 | 6.55 - 7.8 |
| SUMMER | Outside stock area | 8.88 +- 2.23 (6) | 7.05 +- 1.34 (3) | 5.56 - 11.22 | 5.56 - 8.15 |
| SUMMER | Southern Georges Bank / Mid | 9.32 +- 0.57 (3) | 9.32 +- 0.57 (3) | 8.99 - 9.99 | 8.99 - 9.99 |
| WINTER | Gulf of Maine / Northern Georges Bank | 5.97 +- NA (1) | 5.97 +- NA (1) | 5.97 - 5.97 | 5.97 - 5.97 |
| WINTER | Outside stock area | 4.43 +- 0.82 (3) | 4.43 +- 0.82 (3) | 3.52 - 5.1 | 3.52 - 5.1 |
| WINTER | Southern Georges Bank / Mid | 8.13 +- 1 (15) | 7.82 +- 0.74 (5) | 6.29 - 9.51 | 7.23 - 9.01 |
Data
Salinity
Surface and bottom salinity data were pulled from survdat.
Figures
Separate geom_gls() functions were fit for fall and spring measurements; trend lines are only shown when the trend was statistically significant, so some plots may have fewer than two trend lines. Fall has solid trend lines, and spring has dashed trend lines. Please note, sometimes the survey observed a small number of fish outside of the defined stock area. 
Summary
| Season | Region | Mean value +- SD (n years) | Mean value +- SD (past 5 years) | Range (total) | Range (past 5 years) |
|---|---|---|---|---|---|
| FALL | Gulf of Maine / Northern Georges Bank | 32.45 +- 0.29 (28) | 32.6 +- 0.14 (5) | 31.86 - 32.87 | 32.41 - 32.74 |
| FALL | Outside stock area | 31.85 +- 0.43 (28) | 32.12 +- 0.35 (5) | 30.81 - 32.46 | 31.62 - 32.46 |
| FALL | Southern Georges Bank / Mid | 32.84 +- 0.53 (28) | 33.26 +- 0.54 (5) | 31.66 - 33.87 | 32.47 - 33.73 |
| SPRING | Gulf of Maine / Northern Georges Bank | 32.19 +- 0.31 (28) | 32.22 +- 0.27 (5) | 31.34 - 32.61 | 31.91 - 32.61 |
| SPRING | Outside stock area | 31.38 +- 0.64 (28) | 31.72 +- 0.66 (5) | 30.16 - 32.45 | 30.75 - 32.44 |
| SPRING | Southern Georges Bank / Mid | 33.03 +- 0.39 (28) | 33.29 +- 0.41 (5) | 32.21 - 33.89 | 32.77 - 33.89 |
| SUMMER | Gulf of Maine / Northern Georges Bank | 31.81 +- 0.24 (3) | 31.81 +- 0.24 (3) | 31.55 - 32.03 | 31.55 - 32.03 |
| SUMMER | Outside stock area | 31.15 +- 0.2 (3) | 31.15 +- 0.2 (3) | 30.93 - 31.3 | 30.93 - 31.3 |
| WINTER | Gulf of Maine / Northern Georges Bank | 32.33 +- NA (1) | 32.33 +- NA (1) | 32.33 - 32.33 | 32.33 - 32.33 |
| WINTER | Outside stock area | 31.64 +- 0.26 (3) | 31.64 +- 0.26 (3) | 31.34 - 31.85 | 31.34 - 31.85 |
| WINTER | Southern Georges Bank / Mid | 33.21 +- 0.55 (15) | 33.41 +- 0.62 (5) | 32.45 - 34.07 | 32.69 - 34.07 |
| Season | Region | Mean value +- SD (n years) | Mean value +- SD (past 5 years) | Range (total) | Range (past 5 years) |
|---|---|---|---|---|---|
| FALL | Gulf of Maine / Northern Georges Bank | 33.63 +- 0.18 (28) | 33.68 +- 0.14 (5) | 33.25 - 33.98 | 33.46 - 33.82 |
| FALL | Outside stock area | 32.46 +- 0.42 (28) | 32.76 +- 0.56 (5) | 31.74 - 33.39 | 31.94 - 33.39 |
| FALL | Southern Georges Bank / Mid | 33.54 +- 0.39 (28) | 33.73 +- 0.32 (5) | 32.77 - 34.27 | 33.37 - 34 |
| SPRING | Gulf of Maine / Northern Georges Bank | 33.5 +- 0.17 (28) | 33.57 +- 0.09 (5) | 33.04 - 33.93 | 33.43 - 33.69 |
| SPRING | Outside stock area | 32.37 +- 0.5 (28) | 32.64 +- 0.41 (5) | 31.19 - 33.3 | 32.26 - 33.3 |
| SPRING | Southern Georges Bank / Mid | 33.82 +- 0.33 (28) | 34.04 +- 0.26 (5) | 32.93 - 34.37 | 33.79 - 34.37 |
| SUMMER | Gulf of Maine / Northern Georges Bank | 33.41 +- 0.39 (3) | 33.41 +- 0.39 (3) | 32.97 - 33.69 | 32.97 - 33.69 |
| SUMMER | Outside stock area | 32.08 +- 0.46 (3) | 32.08 +- 0.46 (3) | 31.55 - 32.39 | 31.55 - 32.39 |
| WINTER | Gulf of Maine / Northern Georges Bank | 33.49 +- NA (1) | 33.49 +- NA (1) | 33.49 - 33.49 | 33.49 - 33.49 |
| WINTER | Outside stock area | 32.29 +- 0.25 (3) | 32.29 +- 0.25 (3) | 32.02 - 32.51 | 32.02 - 32.51 |
| WINTER | Southern Georges Bank / Mid | 33.86 +- 0.44 (15) | 34 +- 0.39 (5) | 32.92 - 34.52 | 33.44 - 34.39 |
Data
Abundance
Abundance data were pulled from survdat and assessmentdata::stockAssessmentData.
Figures
Separate geom_gls() functions were fit for fall and spring measurements; trend lines are only shown when the trend was statistically significant, so some plots may have fewer than two trend lines. Fall has solid trend lines, and spring has dashed trend lines. Please note, sometimes the survey observed a small number of fish outside of the defined stock area.
Survey abundance (raw measurements): 
Survey abundance (swept area estimates):
Please note, these estimates are not parsed by region or season. Swept area estimates are based on spring and fall surveys only. The shaded gray region indicates +/- two standard errors. 
Assessment abundance:
## [1] "NO DATA"Survey summary
| Season | Region | Mean value +- SD (n years) | Mean value +- SD (past 5 years) | Range (total) | Range (past 5 years) |
|---|---|---|---|---|---|
| FALL | Gulf of Maine / Northern Georges Bank | 17,991.51 +- 26,275.45 (57) | 65,849.2 +- 14,893.84 (5) | 811 - 106,068 | 51,852 - 89,367 |
| FALL | Outside stock area | 4,769.79 +- 6,716.4 (57) | 17,654.4 +- 8,035.01 (5) | 4 - 28,581 | 8,315 - 28,581 |
| FALL | Southern Georges Bank / Mid | 9,586.53 +- 10,698.74 (57) | 22,491.4 +- 20,775.52 (5) | 707 - 56,155 | 3,005 - 56,155 |
| SPRING | Gulf of Maine / Northern Georges Bank | 20,690.19 +- 34,004.41 (52) | 66,580.6 +- 11,345.47 (5) | 47 - 135,353 | 52,785 - 84,011 |
| SPRING | Outside stock area | 4,350.58 +- 7,659.25 (53) | 10,599 +- 6,580.35 (5) | 30 - 44,401 | 1,345 - 19,489 |
| SPRING | Southern Georges Bank / Mid | 9,011.62 +- 11,041.36 (53) | 13,630 +- 6,320.7 (5) | 686 - 46,967 | 8,210 - 23,492 |
| SUMMER | Gulf of Maine / Northern Georges Bank | 1,816.17 +- 999.86 (6) | 2,615.67 +- 661.44 (3) | 761 - 3,365 | 2,113 - 3,365 |
| SUMMER | Outside stock area | 693.67 +- 574.46 (6) | 190.33 +- 17.21 (3) | 178 - 1,487 | 178 - 210 |
| SUMMER | Southern Georges Bank / Mid | 952.33 +- 101.49 (3) | 952.33 +- 101.49 (3) | 860 - 1,061 | 860 - 1,061 |
| WINTER | Gulf of Maine / Northern Georges Bank | 1,697 +- NA (1) | 1,697 +- NA (1) | 1,697 - 1,697 | 1,697 - 1,697 |
| WINTER | Outside stock area | 148.67 +- 138.48 (3) | 148.67 +- 138.48 (3) | 4 - 280 | 4 - 280 |
| WINTER | Southern Georges Bank / Mid | 3,230 +- 2,020.91 (15) | 3,731 +- 2,834.11 (5) | 1,062 - 8,492 | 1,062 - 8,492 |
Data
Survey data (raw measurements):
Survey data (swept area estimates):
Assessment data:
Biomass
Biomass data were pulled from survdat.
Figures
Separate geom_gls() functions were fit for fall and spring measurements; trend lines are only shown when the trend was statistically significant, so some plots may have fewer than two trend lines. Fall has solid trend lines, and spring has dashed trend lines. Please note, sometimes the survey observed a small number of fish outside of the defined stock area.
Survey biomass (raw measurements): 
Survey biomass (swept area estimates):
Please note, these estimates are not parsed by region or season. Swept area estimates are based on spring and fall surveys only. The shaded gray region indicates +/- two standard errors. 
Assessment biomass: 
Summary
| Season | Region | Mean value +- SD (n years) | Mean value +- SD (past 5 years) | Range (total) | Range (past 5 years) |
|---|---|---|---|---|---|
| FALL | Gulf of Maine / Northern Georges Bank | 1,616.16 +- 2,230.63 (57) | 5,978.47 +- 2,333.12 (5) | 153.38 - 8,630.29 | 3,697.28 - 8,630.29 |
| FALL | Outside stock area | 352.34 +- 621.28 (57) | 1,590.84 +- 945.68 (5) | 0.6 - 3,009.06 | 578.98 - 3,009.06 |
| FALL | Southern Georges Bank / Mid | 403 +- 425.71 (57) | 825.66 +- 564.02 (5) | 56.6 - 2,030.2 | 182.56 - 1,548.61 |
| SPRING | Gulf of Maine / Northern Georges Bank | 1,043.87 +- 1,632.16 (52) | 4,485.84 +- 1,343.75 (5) | 4.4 - 5,812.67 | 2,468.61 - 5,812.67 |
| SPRING | Outside stock area | 253.51 +- 389.32 (53) | 644.72 +- 636.03 (5) | 1.2 - 1,520.1 | 30.57 - 1,364.87 |
| SPRING | Southern Georges Bank / Mid | 856.88 +- 866.47 (53) | 896.08 +- 157.62 (5) | 55.77 - 3,637.47 | 733.19 - 1,152.69 |
| SUMMER | Gulf of Maine / Northern Georges Bank | 212.03 +- 79.12 (6) | 214.5 +- 38.19 (3) | 98 - 334.9 | 192.3 - 258.6 |
| SUMMER | Outside stock area | 81.52 +- 77.64 (6) | 18.8 +- 7.73 (3) | 13.1 - 208.2 | 13.1 - 27.6 |
| SUMMER | Southern Georges Bank / Mid | 203.2 +- 21.87 (3) | 203.2 +- 21.87 (3) | 178.9 - 221.3 | 178.9 - 221.3 |
| WINTER | Gulf of Maine / Northern Georges Bank | 45.7 +- NA (1) | 45.7 +- NA (1) | 45.7 - 45.7 | 45.7 - 45.7 |
| WINTER | Outside stock area | 3.7 +- 2.97 (2) | 3.7 +- 2.97 (2) | 1.6 - 5.8 | 1.6 - 5.8 |
| WINTER | Southern Georges Bank / Mid | 239.74 +- 129.23 (15) | 171.63 +- 72.53 (5) | 75.02 - 509.8 | 75.02 - 253.97 |
Data
Survey data (raw measurements):
Survey data (swept area estimates):
Assessment data:
Catch
Stock assessment catch data are from assessmentdata::stockAssessmentData. Recreational catch data were downloaded from NOAA MRIP. Commercial catch data were downloaded from NOAA FOSS.
Figures
Stock assessment catch: 
Recreational catch: 
Commercial catch: 
Commercial vs recreational catch: 
Data
Stock assessment catch:
Recreational catch:
Commercial catch:
Commercial vs recreational catch:
Length
Length data were pulled from survdat. Only years with more than 10 fish lengths were considered for analysis.
Figures
Separate geom_gls() functions were fit for the minimum, mean, and maximum lengths; trend lines are only shown when the trend was statistically significant, so some plots may have fewer than three trend lines. Please note, sometimes the survey observed a small number of fish outside of the defined stock area. 
Summary
| Season | Region | Mean value +- SD (n fish, n years) | Mean value +- SD (n fish, past 5 years) | Range (total) | Range (past 5 years) |
|---|---|---|---|---|---|
| FALL | Gulf of Maine / Northern Georges Bank | 21.21 +- 7.54 (1,025,516, 57) | 21.37 +- 7.59 (329,246, 5) | 1 - 71 | 4 - 66 |
| FALL | Outside stock area | 19.13 +- 8.3 (271,873, 56) | 21.79 +- 6.88 (88,272, 5) | 2 - 76 | 4 - 67 |
| FALL | Southern Georges Bank / Mid | 13.39 +- 8.98 (546,432, 57) | 13.4 +- 8.08 (112,457, 5) | 1 - 64 | 3 - 49 |
| SPRING | Gulf of Maine / Northern Georges Bank | 18.22 +- 5.72 (1,075,890, 52) | 19.96 +- 6.49 (332,903, 5) | 3 - 67 | 5 - 66 |
| SPRING | Outside stock area | 16.96 +- 7.7 (230,569, 53) | 17.31 +- 7.84 (52,995, 5) | 2 - 73 | 5 - 61 |
| SPRING | Southern Georges Bank / Mid | 21.75 +- 8.01 (477,616, 53) | 18.89 +- 7.48 (68,150, 5) | 2 - 78 | 3 - 50 |
| SUMMER | Gulf of Maine / Northern Georges Bank | 23.21 +- 6.39 (8,564, 6) | 21.74 +- 5.09 (6,791, 3) | 4 - 63 | 4 - 50 |
| SUMMER | Outside stock area | 23.82 +- 7.22 (2,312, 6) | 22.3 +- 5.49 (388, 3) | 10 - 53 | 12 - 50 |
| SUMMER | Southern Georges Bank / Mid | 29.63 +- 7.37 (1,786, 3) | 29.63 +- 7.37 (1,786, 3) | 12 - 58 | 12 - 58 |
| WINTER | Gulf of Maine / Northern Georges Bank | 15.98 +- 2.87 (1,433, 1) | 15.98 +- 2.87 (1,433, 1) | 11 - 28 | 11 - 28 |
| WINTER | Outside stock area | 11.41 +- 4.52 (368, 2) | 11.41 +- 4.52 (368, 2) | 6 - 28 | 6 - 28 |
| WINTER | Southern Georges Bank / Mid | 21.85 +- 7.23 (27,182, 15) | 18.54 +- 7.41 (5,497, 5) | 3 - 53 | 5 - 46 |
Data
Condition
Condition information comes from diet data; only regions and seasons with more than 10 fish observations were considered. We calculated a rough condition factor as: Weight / Length^3, and relative weight was previously calculated.
Figures
Length vs weight
Please note, no trend lines were fit, points are jittered to reduce overlap, and sometimes the survey observed a small number of fish outside of the defined stock area. 
Condition factor: Weight-volume
If there were more than 30 years of data, a geom_gls() regression was fit. In order to fit the geom_gls() regression, we calculated the mean condition factor for each year and plotted the geom_gls() through those points. Please note, points are jittered to reduce overlap, and sometimes the survey observed a small number of fish outside of the defined stock area. 
Condition factor: Relative weight
Please note, this data is aggregated by Ecological Protection Unit (EPU), which may differ slightly from the stock assessment regions. 
Data
Length vs weight with weight-volume condition factor
Relative weight condition factor Please note, this data is aggregated by Ecological Protection Unit (EPU), which may differ slightly from the stock assessment regions.
Risk analysis
A preliminary risk analysis was conducted by ranking all species according to their indicator values. A high rank number and a normalized rank near 1 indicates that the species is at risk or of importance based on the measured indicator values. When a species was missing an indicator, it was assigned a normalized rank of 0.5.